As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4007 THE CREW REPORTED THEY NOTICED AN ELECTRICAL SMOKE SMELL WHEN NR 1 PACK WAS SELECTED. PACK 1 DEFFERED PER MEL 21-29 AUTH # 030322D-C. FOUND AIR CYCLE MACHINE BLADES TO BE DAMAGED. REMOVED AND REPLACED THE IAW AMM 21-51-03. OPS CHECK GOOD. MEL RESTORED. THE AIRCRAFT WAS RETURNED TO SERVICE.